Loom-shuttle check



Oct. 1, 1929. p BALCQM 1,729,920

' LOOM SHUTTLE CHECK El If] Filed June 6. 1928 Patented a. 1, 1929 UNITED STATES PETER F. BALCOM, OF WORCESTER, .MASSACHUSETTS Loom-SHUTTLE CHECK Application filed June 6, 1928. Serial No. 283,197.

This invention relates to improvements in a loom shuttle check. An object of the invention is to check the shuttle as it enters the shuttle box in order to prevent its rebounding and to retain it in a definite position prior to its being thrown across the loom.

It comprises in general an arm that is pivotally mounted on the shuttle binder substantially at a point that is midway of its length. As the shuttle enters the. box it engages one end of the pivotally mounted check lever, and, as it passes beyond the pivotal point of the check lever, this lever is tilted and automatically clamps the shuttle between the check lever arm and the opposite wall of the shuttle box. An expansion spring is provided for automatically exerting a pressure on one end of the check lever for automatically operating to assist in moving the shuttle against the opposite wall and retain it in that position against any rebound.

Referring to the drawings:

Fig. 1 is a. plan view showing in full lines the shuttle in a clamped or checked position and in dotted lines a position of the shuttle as it enters the box, the check lever being shown in two positions, and

Fig. 2 is a side elevational View of Fig. 1.

Referring to the drawings in detail:

1 designates the lay part at the right hand end of the shuttle box, the entrance or channel end of the shuttle box being indicated at 2. 3 is the usual shuttle binder lever that is pivotally connected to the fixed part 4 of the loom by means of the pin 5. Pivotally connected to the binder lever 3 is the check lever 6, the pivotal connection being indicated at 7 which pivotal connection is located as shown, substantially at the middle point of its length. The longer arm of the check lever being designated at 6 and the shorter arm at 6". 8 is an expansion coil spring that is located in the recesses 9 and 10 of the check lever 6 and the binder lever 3. The curved surface 11 of the check lever 6 is preferably covered with a strip of leather which provides a wearing surface and to a certain extent friction to prevent the shuttle from rebounding.

The shuttle as it enters the box is indicated at 13, shown in a dotted line position. As the forward end of the shuttle passes beyond the pivot point 7 of the check lever 6 this lE'VEl will assume the full line position 6 This operation compresses the expansion coil spring 8 and at the same time, this spring reacts to force the shuttle 13 against the opposite wall 1d of the shuttle box. This spring therefore cooperates with the check lever 6 to check the movement of the shuttle and to retain it in its check position. The usual picker stick is indicated at 15. reason of the surface 11 of the check lever 6 being a long straight portion and substantially in its center part of the shuttle 13 will be firmly clamped in its stopping position. 2

The end of the'binder lever 8'engages the usual protector finger 16 which is connected with the rock shaft17 a portion of which is shown but it does not form any part of the present invention.

An important feature of the present invention is the formation of the inner surface of the binder lever 3 which formation comprises the surfaces 18 and 19 that are located at an angle to each other. The apex of the angle being coincident with the pivot pin 7 of the hinge joint. This angle is substantially indicated at 20. The surfaces 18 and 19 therefore permit the shuttle check lever 6 to assume the full line position shown when the shuttle comes to rest. As the shuttle comes to rest the end 6 of the check lever as well as the spring 8 forces the shuttle against the wall 1 1.

From this description it will be seen that the shuttle is gradually checked as it enters the shuttle box, that the check lever 6 auto matically retains the shuttle in a fixed position in order to permit the spool to be in serted and removed from the shuttle.

I am aware of the U. S. patent granted to Francis Rea, dated March 4, 1873, Numbered 136,384. In that patent is disclosed a swivel plate G that is pivotally mounted on an adjustable spring. The inner or shuttle face receiving side is formed on a straight line and its pivotal connection is such that when the shuttle finally comes to rest, the line of pressure is substantially opposite the pivotal connection. The construction of my shuttle check is such that when the shuttle finally comes to rest it is beyond the pivotal connection assisted by the coiled expansion spring 8, which presses against the lever 6, as shown by the full line position of this lever. The two angular arranged surfaces 18 and 19 permits the lever 6 to tilt. The lever 6 in the dotted line position afli'ords an easy entrance for the shuttle and is gradually brought to its position of rest, without any rebounding effect, which is a very important feature.

What I claim is: e V A shuttle check comprising a binder lever having its inner surface formed with two surfaces that are at an angle to each other, a check lever pivotally connected to the inner surface of the binder lever and at the apex of said surfaces, the check lever having a long straight surface against which the shuttle engages and a gradual curve at its forward end, the inner end portion of the binder lever and the shuttle check each having a recess that is opposite each other, an expansive coiled spring in the recesses for normally moving the forward end of the shuttle check against one of the inclined surfaces of the binder lever and serving to force the shuttle against the box, as the shuttle passes inward beyond the pivot of the shuttle check, said check lever being located wholly on the inner surface of the binder lever and movable toward and from the two inclined surfaces.

PETER F. BALCOM. 

